CVE-2026-17544CWE-787

CVE-2026-17544

Critical · published July 30, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
35.0
In the wild
Unconfirmed
What it is

Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00418 · 35.0th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-07-30T16:17Z
Affected products (2)
ProductVersionsFixed in
php/php≥ 8.4.0, < 8.4.248.4.24
php/php≥ 8.5.0, < 8.5.98.5.9
References (1)
https://github.com/php/php-src/security/advisories/GHSA-x692-q9x7-8c3f · [email protected]
EPSS history
Timeline
  • 30 JUL 11:22Z
    Out-of-bounds write in bccomp() via crafted operand and scale
    cvelistv5